Thomas L. Hume Jr., 82, a former investment broker in Washington, died Feb. 6 at the Wisconsin Avenue Nursing Home, where he had lived for six years. He had a gastrointestinal disorder.

Mr. Hume first joined his father's investment firm, Thomas L. Hume and Co., after serving in the Navy in World War I.

In 1931, he became manager of the municipal department of the Washington branch of the Guaranty Trust Co. and spent several years in New York. He rejoined his father's firm in 1939.

He continued to manage the office after his father's death in 1945. Later, he worked in the offices of Laidlaw Adams and Peck until his retirement 10 years ago.

Mr. Hume was a sixth-generation Washingtonian. A graduate of Western High School, he attended George Washington University. He was one of the first Navy aviators to serve in World War I.

He taught Sunday school at Saint Alban's Episcopal Church for 20 years. He was a member of the crew of the old Analostan Boat Club here and belonged to the Sons of the Revolution and the Chevy Chase Club.

He is survived by two daughters, Caroline Dilweg of Summer, Md., and Suzanne Kiernan of Washington; a son, Thomas L. IV of St. Thomas, Virgin Islands; three brothers, James Pickrell Hume of Chicago, Patrick Henry Hume of Washington, and Richare Hume of Annapolis; a sister, Virginia Hume Voigt of Pittsburgh, and eight grandchildren.